.tabitem{
  margin: 10px 15px;
}

.tabitem div span{
  font-size: 20px;
  font-weight: bold;
  margin-right: 10px;
}
/* 颜色切换 */
.tabitem  div:nth-child(1) span{
  color: red;
}
.tabitem div:nth-child(2) span{
  color: orangered;
}
.tabitem div:nth-child(3) span{
  color: orange;
}
 .img {
position: absolute;
left: 250px;

}